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Facile Synthesis Route of Au-Ag Nanostructures Soaked in PEG

Advances in Nanoparticles 2018年第2期7卷 37-45页

作者： Essy Kouadio Fodjo Ali Canlier Cong Kong Ayhan Yurtsever pohan lemeyonouin aliou guillaume Fato Tano Patrice Masayuki Abe Tetsuya Tohei Akira Sakai Laboratoire de Chimie Physique Université Felix Houphouet-Boigny Abidjan Cote d’Ivoire Department of Materials Science and Nanotechnology Engineering Abdullah Gul University Kayseri Turkey Department of Chemical Engineering and Applied Chemistry College of Engineering Chungnam National University Daejeon Republic of Korea Key Laboratory of East China Sea Fishery Resources Exploitation Ministry of Agriculture East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Shanghai China Graduate School of Engineering Science Osaka University Toyonaka Osaka Japan UFR Sciences Biologiques Peleforo-Gon-Coulibaly University Korhogo Cote d’Ivoire Key Laboratory for Advanced Materials and Department of Chemistry East China University of Science and Technology Shanghai China

A nanostructured gold-silver soaked in polyethylene glycol 400 (Au-Ag@PEG) is designed using gold(I) chloride and silver nitrate (AgNO3) as precursors and, polyethylene glycol 400 (PEG) as capping agent. The result of the structure characterization using Selected Area Electron Diffraction (SAED) has showed that the synthesized nanomaterial has a good crystallinity while Transmission Electron Microscopy (TEM), energy dispersive X-ray spectrometry (EDX) and Dynamic Light Scattering (DLS) measurements suggest mixed Au-Ag nanoparticles with an average diameter size of around 7 nm and 30 nm for Au and Ag respectively.

关键词： SAED Pattern Au-Ag Nanomaterials Soaked in PEG Nanoparticle Synthesis

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Photocatalytic and Antimicrobial Properties of [AgTiO<sub>2</sub>]:[Clay] Nanocomposite Prepared with Clay Different Ratios

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Modern Research in Catalysis 2020年第4期9卷 47-61页

作者： lemeyonouin aliou guillaume pohan Ollo Kambiré Muhammad Nasir Lassiné Ouattara UFR Sciences Biologiques Université Peleforo Gon Coulibaly de Korhogo Korhogo C&#244te d’Ivoire Interdisciplinary Research Centre in Biomedical Materials COMSAT University Islamabad-Lahore Campus (CUI) Lahore Pakistan UFR Sciences et Technologies Université de Man Man C&#244te d’Ivoire Laboratoire de Constitution et réaction de la matière UFR SSMT Université Félix Houphou&#235t-Boigny de Cocody Abidjan C&#244te d’Ivoire

This work aimed to synthesis a novel material that would be able to efficiently remove both organic and microbiological pollutants from wastewater. Through the hydrothermal process, we first doped titanium dioxide, a semiconductor possessing excellent photocatalytic properties with silver nanoparticles having good antibacterial properties. The obtained material was then associated with clay known for its good adsorbent properties to form [AgTiO2]:[clay] type nanocomposites. The different mass composition of [AgTiO2]:[clay] considered in this work were 1:1;1:0.5;1:0.1;1:0.05 and 1:0.01. The prepared nanocomposites were characterized by means of XRD, FTIR and SEM techniques. Results revealed the presence of TiO2 anatase and Ag on the surface of the clay mainly composed of kaolinite and quartz. The photocatalytic activities of the nanocomposites were tested in the presence of synthetic Orange II (25 mg/L) wastewater under visible light irradiation. The experiments demonstrated that organic pollutants were effectively photodegraded when the proportion of clay in the mixture (AgTiO2)-(Clay) was inferior or equaled to 50%. The use of commercial TiO2, for comparison purpose, showed a lower degradation efficiency of the Orange II solution (η 2]:[clay] were also assessed in the presence of two types of bacteria E. coli (Gram negative) and S. aureus (Gram positive). The antibacterial activities of the nanocomposites were characterized with and without UV irradiation. In dark conditions, the antibacterial activities of nanocomposites (AgTiO2)-(Clay) against S. aureus gradually increased with increasing the clay amount. Under visible light irradiation, the nanocomposites showed a significant antimicrobial activity against E. coli and S. aureus.

关键词： Photocatalysis Antimicrobial Activity Organic Pollutant Clay Wastewater

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